Pearson Mast Step
I had the same problem on my Pearson 365. The spar guys who added PVC to my inner mast cut a very dense form of plastic from their shop and put in place. I don''t know what the material was, but a spar shop should know about it (I used Styx and Rigging in Kemah, TX). The old mast step was able to sit above plastic block. Had to purchase longer SS bolts, but most options I think you''ll need to do this anyways.